Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dye
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jece.2019.103264 http://hdl.handle.net/11449/190497 |
Resumo: | Although several factors are found to influence the efficiency of photoelectrocatalytic oxidation, univariate optimization may not provide some relevant information, such as the existence of interaction between the factors. This article describes the optimization of photoelectrocatalytic parameters by response surface methodology (RSM) using a two-level full factorial composite design with center point. The factors investigated included pH, bias potential and counter electrode material (C.E.) employed in the photoelectrocatalytic degradation of 50 mg L-1 Acid Red 151 (AR151) azo dye (taken as a model textile dye) in 0.01 mol L-1 Na2SO4 electrolyte, using boron-doped TiO2 nanotube (B-TNT) photoanode under UV/Vis Hg lamp irradiation. The responses evaluated were total organic carbon removal and decolorization. The results showed that all the factors exerted a significant effect, among which the pH was the variable with the greatest impact on the PEC treatment. Although less significant, interactions between the variables, such as pH and the counter electrode, were observed for both responses. The best conditions for the photoelectrocatalytic degradation of AR151 dye were pH 2.0 and potential of 2.0 V using graphite as counter electrode. Photoelectrocatalytic treatment of 50 mg L-1 of AR151 dye reached total decolorization in 30 min and almost total mineralization after 90 min. The findings show that the use of RSM to optimize degradation conditions helps to save time and chemicals, in addition to contributing toward a better understanding of the factors that affect photoelectrocatalytic performance. |
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Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dyeAzo dyeCounter electrode materialDoped TiO2PhotoelectrocatalysisResponse surface methodologyAlthough several factors are found to influence the efficiency of photoelectrocatalytic oxidation, univariate optimization may not provide some relevant information, such as the existence of interaction between the factors. This article describes the optimization of photoelectrocatalytic parameters by response surface methodology (RSM) using a two-level full factorial composite design with center point. The factors investigated included pH, bias potential and counter electrode material (C.E.) employed in the photoelectrocatalytic degradation of 50 mg L-1 Acid Red 151 (AR151) azo dye (taken as a model textile dye) in 0.01 mol L-1 Na2SO4 electrolyte, using boron-doped TiO2 nanotube (B-TNT) photoanode under UV/Vis Hg lamp irradiation. The responses evaluated were total organic carbon removal and decolorization. The results showed that all the factors exerted a significant effect, among which the pH was the variable with the greatest impact on the PEC treatment. Although less significant, interactions between the variables, such as pH and the counter electrode, were observed for both responses. The best conditions for the photoelectrocatalytic degradation of AR151 dye were pH 2.0 and potential of 2.0 V using graphite as counter electrode. Photoelectrocatalytic treatment of 50 mg L-1 of AR151 dye reached total decolorization in 30 min and almost total mineralization after 90 min. The findings show that the use of RSM to optimize degradation conditions helps to save time and chemicals, in addition to contributing toward a better understanding of the factors that affect photoelectrocatalytic performance.São Paulo State University (Unesp) Institute of Chemistry, Araraquara. Av. Prof. Francisco Degni, 55Western Paraná State University (UNIOESTE) Center for Engineering and Exact Sciences, Rua da Faculdade, 645State University of Londrina (UEL) Department of Chemistry Environmental Electrochemistry Laboratory (LabEA), Rodovia Celso Garcia Cid, PR 445 Km 380Federal University of Bahia (UFBA) Chemistry and Chemometrics Research Group, Rua Barão de Jeremoabo, 147National Institute of Alternative Technologies for Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Av. Prof. Francisco Degni, 55São Paulo State University (Unesp) Institute of Chemistry, Araraquara. Av. Prof. Francisco Degni, 55Universidade Estadual Paulista (Unesp)Center for Engineering and Exact SciencesUniversidade Estadual de Londrina (UEL)Universidade Federal da Bahia (UFBA)Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM)Bessegato, Guilherme G. [UNESP]De Almeida, Lucio C. [UNESP]Ferreira, Sérgio L.C.Zanoni, Maria Valnice Boldrin [UNESP]2019-10-06T17:15:08Z2019-10-06T17:15:08Z2019-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jece.2019.103264Journal of Environmental Chemical Engineering, v. 7, n. 4, 2019.2213-3437http://hdl.handle.net/11449/19049710.1016/j.jece.2019.1032642-s2.0-85069055050Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Environmental Chemical Engineeringinfo:eu-repo/semantics/openAccess2021-10-23T12:04:51Zoai:repositorio.unesp.br:11449/190497Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T12:04:51Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dye |
title |
Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dye |
spellingShingle |
Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dye Bessegato, Guilherme G. [UNESP] Azo dye Counter electrode material Doped TiO2 Photoelectrocatalysis Response surface methodology |
title_short |
Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dye |
title_full |
Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dye |
title_fullStr |
Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dye |
title_full_unstemmed |
Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dye |
title_sort |
Experimental design as a tool for parameter optimization of photoelectrocatalytic degradation of a textile dye |
author |
Bessegato, Guilherme G. [UNESP] |
author_facet |
Bessegato, Guilherme G. [UNESP] De Almeida, Lucio C. [UNESP] Ferreira, Sérgio L.C. Zanoni, Maria Valnice Boldrin [UNESP] |
author_role |
author |
author2 |
De Almeida, Lucio C. [UNESP] Ferreira, Sérgio L.C. Zanoni, Maria Valnice Boldrin [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Center for Engineering and Exact Sciences Universidade Estadual de Londrina (UEL) Universidade Federal da Bahia (UFBA) Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) |
dc.contributor.author.fl_str_mv |
Bessegato, Guilherme G. [UNESP] De Almeida, Lucio C. [UNESP] Ferreira, Sérgio L.C. Zanoni, Maria Valnice Boldrin [UNESP] |
dc.subject.por.fl_str_mv |
Azo dye Counter electrode material Doped TiO2 Photoelectrocatalysis Response surface methodology |
topic |
Azo dye Counter electrode material Doped TiO2 Photoelectrocatalysis Response surface methodology |
description |
Although several factors are found to influence the efficiency of photoelectrocatalytic oxidation, univariate optimization may not provide some relevant information, such as the existence of interaction between the factors. This article describes the optimization of photoelectrocatalytic parameters by response surface methodology (RSM) using a two-level full factorial composite design with center point. The factors investigated included pH, bias potential and counter electrode material (C.E.) employed in the photoelectrocatalytic degradation of 50 mg L-1 Acid Red 151 (AR151) azo dye (taken as a model textile dye) in 0.01 mol L-1 Na2SO4 electrolyte, using boron-doped TiO2 nanotube (B-TNT) photoanode under UV/Vis Hg lamp irradiation. The responses evaluated were total organic carbon removal and decolorization. The results showed that all the factors exerted a significant effect, among which the pH was the variable with the greatest impact on the PEC treatment. Although less significant, interactions between the variables, such as pH and the counter electrode, were observed for both responses. The best conditions for the photoelectrocatalytic degradation of AR151 dye were pH 2.0 and potential of 2.0 V using graphite as counter electrode. Photoelectrocatalytic treatment of 50 mg L-1 of AR151 dye reached total decolorization in 30 min and almost total mineralization after 90 min. The findings show that the use of RSM to optimize degradation conditions helps to save time and chemicals, in addition to contributing toward a better understanding of the factors that affect photoelectrocatalytic performance. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-06T17:15:08Z 2019-10-06T17:15:08Z 2019-08-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.jece.2019.103264 Journal of Environmental Chemical Engineering, v. 7, n. 4, 2019. 2213-3437 http://hdl.handle.net/11449/190497 10.1016/j.jece.2019.103264 2-s2.0-85069055050 |
url |
http://dx.doi.org/10.1016/j.jece.2019.103264 http://hdl.handle.net/11449/190497 |
identifier_str_mv |
Journal of Environmental Chemical Engineering, v. 7, n. 4, 2019. 2213-3437 10.1016/j.jece.2019.103264 2-s2.0-85069055050 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Environmental Chemical Engineering |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1792961568190758912 |